Mine own profit (το εμουτου συμφερον). Old word from συμφερω, to bear together, and explains use of verb in verse 1. Corinthians 10:23.

That they may be saved (ινα σωθωσιν). First aorist passive subjunctive of σωζω, to save, with ινα purpose clause with same high motive as in 1. Corinthians 9:22. This is the ruling passion of Paul in his dealings with men.